Imaging Through Turbid Media by Polarized Light

E. E. Gorodnichev*, S. V. Ivliev, A. I. Kuzovlev, and D. B. Rogozkin

National Research Nuclear University MEPhI, Kashirskoe sh. 31, Moscow, 115409 Russia

*e-mail: gorodn@theor.mephi.ru

Received July 19, 2011; in final form, October 20, 2011; published online February 6, 2012

Abstract—A theoretical approach to the calculation of the image of an inhomogeneity in transillumination of
tissue-like media using polarized radiation is developed in the approximation of the basic polarization modes.
The method is based on the solution of the nonstationary transfer equation in the Fokker–Planck approximation.
An expression for the edge spread function of the image of a totally absorbing half-plane is derived. A gener-
alization to the image profile of inhomogeneity that represents a finite-width stripe is presented. The spatial res-
olution (sharpness) and contrast of image are analyzed at various time intervals of detection. The image param-
eters are compared for the polarization-difference technique and imaging in unpolarized light. It is demon-
strated that the imaging using the difference of linear polarizations is similar to the imaging using the pulsed
unpolarized radiation with a detection interval of about z/2c (z is the thickness of the sample and c is the velocity
of light). The results are in agreement with the experimental data on the differential polarization transillumina-
tion of tissue-like media.

DOI: 10.1134/S1054660X1203005X

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.